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McC TAKS Objective 4

McC TAKSObjective 4

energy the ability to do work
work the product of force and the distance over which it moves
motion a constant change in the location of a body
speed Distance traveled divided by the time needed to travel that distance
wave a disturbance that moves through a medium
wavelength The length of a single cycle of a wave, as measured by the distance between one peak or trough of a wave and the next
amplitude the maximum height of the wave crest above the rest position or the maximum depth of the wave trough below the rest position
frequency the number of waves that pass a single point in a given amount of time
kinetic energy Energy of motion
potential energy Stored energy
weight the force of gravity acting on a mass
force A push or a pull; has a size and direction
friction Any force that resists motion
unbalanced force Unequal forces acting on an object – results in a change in the object’s motion in the direction of the larger force
balanced force Describes forces that are equal but opposite in directions; cancel each other out and no change in motion occurs
acceleration Change in velocity divided by the amount of time needed for that change to take place; speeds up, slows down or changes direction
thermal energy The total energy of all the particles in a sample of matter
chemical energy Energy produced by a chemical reaction or chemical change
mechanical energy the energy which is possessed by an object due to its motion or due to its position; either kinetic or potential energy
electrical energy Energy of electric charges or electric current
pulley a simple machine that can change the direction of force
lever a simple machine made with a bar free to move about a fixed point called a fulcrum
velocity speed and direction of a moving body; average velocity can be calculated by dividing displacement by time
distance the entire path an object travels
gravity force of attraction between all objects in the universe
inertia an object's tendancy to remain at rest or keep moving with constant velocity
Newton's Laws laws of motion first stated by Isaac Newton
Created by: MCJH